build(deps): bump the npm_and_yarn group across 8 directories with 6 updates

[dependabot]

Bumps the npm_and_yarn group with 2 updates in the /apps/next-js directory: js-yaml and undici.
Bumps the npm_and_yarn group with 1 update in the /examples/cookbook/mastra directory: ws.
Bumps the npm_and_yarn group with 1 update in the /examples/javascript directory: js-yaml.
Bumps the npm_and_yarn group with 1 update in the /examples/javascript-web directory: vite.
Bumps the npm_and_yarn group with 1 update in the /moss-live-labs/examples/image-search/react-app directory: js-yaml.
Bumps the npm_and_yarn group with 1 update in the /packages/vitepress-plugin-moss directory: vite.
Bumps the npm_and_yarn group with 2 updates in the /packages/vitepress-plugin-moss/demo-site/documentation directory: esbuild and vite.
Bumps the npm_and_yarn group with 2 updates in the /sdks/javascript/sdk directory: js-yaml and markdown-it.

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates undici from 7.25.0 to 7.28.0

Release notes

Sourced from undici's releases.

v7.28.0

⚠️ Security Release

This release line addresses 7 security advisories, all shipped in v7.28.0.

Action required: Upgrade to undici 7.28.0 or later.

npm install undici@^7.28.0

The v7 line is not affected by GHSA-38rv-x7px-6hhq (CVE-2026-9675), which is an 8.x-only regression.

Note on GHSA-hm92-r4w5-c3mj: this fix shipped in v7.28.0, not the earlier 7.2x line — the vulnerable single-pool code was still present through v7.27.2. The per-origin pool fix is 3805b8f8 (#5041).

Summary

Advisory	CVE	Severity (CVSS)	Fixed in	Fix commit
GHSA-vxpw-j846-p89q	CVE-2026-12151	High (7.5)	7.28.0	8cb10f98
GHSA-vmh5-mc38-953g	CVE-2026-9697	High (7.4)	7.28.0	04201f89
GHSA-hm92-r4w5-c3mj	CVE-2026-6734	High (7.5)	7.28.0	3805b8f8
GHSA-pr7r-676h-xcf6	CVE-2026-9678	Moderate (5.9)	7.28.0	85a24055
GHSA-p88m-4jfj-68fv	CVE-2026-9679	Moderate (5.9)	7.28.0	d0574cc4
GHSA-g8m3-5g58-fq7m	CVE-2026-11525	Low (3.7)	7.28.0	d0574cc4
GHSA-35p6-xmwp-9g52	CVE-2026-6733	Low (3.7)	7.28.0	ea8930cf

---

High severity

WebSocket DoS via fragment count bypass — CVE-2026-12151

GHSA-vxpw-j846-p89q · CWE-400, CWE-770 Fix: 8cb10f98 websocket: limit the number of fragments in a message (part of backport a027a4a0 Backport WebSocket maxPayloadSize fixes to v7.x, #5423)

A malicious WebSocket server can stream a large number of small or empty continuation frames. Undici enforced a limit on cumulative payload size but did not limit the number of fragments per message, leading to unbounded memory growth and denial of service.

• Affected: applications using new WebSocket(...) or WebSocketStream against untrusted endpoints.
• Workaround: none — upgrade is required.

TLS certificate validation bypass in SOCKS5 ProxyAgent — CVE-2026-9697

GHSA-vmh5-mc38-953g · CWE-295

... (truncated)

Commits

• f9eba0a Bumped v7.28.0 (#5430)
• a027a4a Backport WebSocket maxPayloadSize fixes to v7.x (#5423)
• 8cb10f9 websocket: limit the number of fragments in a message
• 04201f8 fix: honor requestTls when proxy is SOCKS5
• fcd642f fix(socks5): preserve dispatch backpressure return value (#5166)
• bc98c97 fix(socks5): use configured connector in Socks5ProxyAgent (#5168)
• 9e1c743 fix(socks5): encode embedded IPv4 tails in IPv6 literals correctly (#5099)
• 376c8be fix(socks5): enforce authenticated state before CONNECT (#5097)
• 3805b8f fix(socks5-proxy-agent): use per-origin pools to prevent cross-origin routing...
• 85a2405 fix(cache): trim qualified field names
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates undici from 7.25.0 to 7.28.0

Release notes

Sourced from undici's releases.

v7.28.0

⚠️ Security Release

This release line addresses 7 security advisories, all shipped in v7.28.0.

Action required: Upgrade to undici 7.28.0 or later.

npm install undici@^7.28.0

The v7 line is not affected by GHSA-38rv-x7px-6hhq (CVE-2026-9675), which is an 8.x-only regression.

Note on GHSA-hm92-r4w5-c3mj: this fix shipped in v7.28.0, not the earlier 7.2x line — the vulnerable single-pool code was still present through v7.27.2. The per-origin pool fix is 3805b8f8 (#5041).

Summary

Advisory	CVE	Severity (CVSS)	Fixed in	Fix commit
GHSA-vxpw-j846-p89q	CVE-2026-12151	High (7.5)	7.28.0	8cb10f98
GHSA-vmh5-mc38-953g	CVE-2026-9697	High (7.4)	7.28.0	04201f89
GHSA-hm92-r4w5-c3mj	CVE-2026-6734	High (7.5)	7.28.0	3805b8f8
GHSA-pr7r-676h-xcf6	CVE-2026-9678	Moderate (5.9)	7.28.0	85a24055
GHSA-p88m-4jfj-68fv	CVE-2026-9679	Moderate (5.9)	7.28.0	d0574cc4
GHSA-g8m3-5g58-fq7m	CVE-2026-11525	Low (3.7)	7.28.0	d0574cc4
GHSA-35p6-xmwp-9g52	CVE-2026-6733	Low (3.7)	7.28.0	ea8930cf

---

High severity

WebSocket DoS via fragment count bypass — CVE-2026-12151

GHSA-vxpw-j846-p89q · CWE-400, CWE-770 Fix: 8cb10f98 websocket: limit the number of fragments in a message (part of backport a027a4a0 Backport WebSocket maxPayloadSize fixes to v7.x, #5423)

A malicious WebSocket server can stream a large number of small or empty continuation frames. Undici enforced a limit on cumulative payload size but did not limit the number of fragments per message, leading to unbounded memory growth and denial of service.

• Affected: applications using new WebSocket(...) or WebSocketStream against untrusted endpoints.
• Workaround: none — upgrade is required.

TLS certificate validation bypass in SOCKS5 ProxyAgent — CVE-2026-9697

GHSA-vmh5-mc38-953g · CWE-295

... (truncated)

Commits

• f9eba0a Bumped v7.28.0 (#5430)
• a027a4a Backport WebSocket maxPayloadSize fixes to v7.x (#5423)
• 8cb10f9 websocket: limit the number of fragments in a message
• 04201f8 fix: honor requestTls when proxy is SOCKS5
• fcd642f fix(socks5): preserve dispatch backpressure return value (#5166)
• bc98c97 fix(socks5): use configured connector in Socks5ProxyAgent (#5168)
• 9e1c743 fix(socks5): encode embedded IPv4 tails in IPv6 literals correctly (#5099)
• 376c8be fix(socks5): enforce authenticated state before CONNECT (#5097)
• 3805b8f fix(socks5-proxy-agent): use per-origin pools to prevent cross-origin routing...
• 85a2405 fix(cache): trim qualified field names
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates ws from 8.20.1 to 8.21.0

Release notes

Sourced from ws's releases.

8.21.0

Features

• Introduced the maxBufferedChunks and maxFragments options (2b2abd45).

Bug fixes

• Fixed a remote memory exhaustion DoS vulnerability (2b2abd45).

A high volume of tiny fragments and data chunks could be sent by a peer, using modest network traffic, to crash a ws server or client due to OOM.

import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer({ port: 0 }, function () {
const data = Buffer.alloc(1);
const options = { fin: false };
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port});
ws.on('open', function () {
(function send() {
ws.send(data, options, function (err) {
if (err) return;
send();
});
})();
});
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(client close - code: ${code} reason: ${reason.toString()});
});
});
wss.on('connection', function (ws) {
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(server close - code: ${code} reason: ${reason.toString()});
});
});

The vulnerability was responsibly disclosed and fixed by Nadav Magier.

In vulnerable versions, the issue can be mitigated by lowering the value of the maxPayload option if possible.

Commits

• bca91ad [dist] 8.21.0
• 2b2abd4 [security] Limit retained message parts
• 78eabe2 [security] Add latest vulnerability to SECURITY.md
• See full diff in compare view

Updates ws from 8.20.1 to 8.21.0

Release notes

Sourced from ws's releases.

8.21.0

Features

• Introduced the maxBufferedChunks and maxFragments options (2b2abd45).

Bug fixes

• Fixed a remote memory exhaustion DoS vulnerability (2b2abd45).

A high volume of tiny fragments and data chunks could be sent by a peer, using modest network traffic, to crash a ws server or client due to OOM.

import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer({ port: 0 }, function () {
const data = Buffer.alloc(1);
const options = { fin: false };
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port});
ws.on('open', function () {
(function send() {
ws.send(data, options, function (err) {
if (err) return;
send();
});
})();
});
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(client close - code: ${code} reason: ${reason.toString()});
});
});
wss.on('connection', function (ws) {
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(server close - code: ${code} reason: ${reason.toString()});
});
});

The vulnerability was responsibly disclosed and fixed by Nadav Magier.

In vulnerable versions, the issue can be mitigated by lowering the value of the maxPayload option if possible.

Commits

• bca91ad [dist] 8.21.0
• 2b2abd4 [security] Limit retained message parts
• 78eabe2 [security] Add latest vulnerability to SECURITY.md
• See full diff in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

Updates js-yaml from 4.1.1 to 4.3.0

Changelog

Sourced from js-yaml's changelog.

4.3.0, 3.15.0 - 2026-06-27

Security

• Backported maxTotalMergeKeys option.

[5.2.0] - 2026-06-26

Added

• Added maxTotalMergeKeys (10000) loader option to limit the total number of keys processed by YAML merge (<<) across one load() / loadAll() call.
• Added maxAliases (-1) loader option to limit the number of YAML aliases per document.

Removed

• maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge processing.

Fixed

• Round-trip of integers with exponential form (>= 1e21)

[5.1.0] - 2026-06-23

Added

• Collection tags can finalize an incrementally populated carrier into a different result value.

Changed

• [breaking] quoteStyle now selects the preferred quote style; use the restored forceQuotes option to force quoting non-key strings.

[5.0.0] - 2026-06-20

Added

• Added named exports for schemas, tags, parser events and AST utilities.
• Reworked JSON_SCHEMA and CORE_SCHEMA with spec-compliant scalar resolution rules, and added YAML11_SCHEMA.
• Added realMapTag for lossless mappings with non-string and complex keys. Object-based mappings now reject complex keys instead of stringifying them.
• Added dump() transform option for changing the generated AST before rendering.
• Added dump() options seqInlineFirst, flowBracketPadding, flowSkipCommaSpace, flowSkipColonSpace, quoteFlowKeys, quoteStyle and tagBeforeAnchor.
• Added formal data layers (events and AST) for modular data pipelines.
  • Added low-level parser (to events), presenter and visitor APIs.
• Added the YAML Test Suite to the test set.

Changed

• See the migration guide for upgrade notes.
• Rewritten in TypeScript and reorganized the public API around flat named exports.

... (truncated)

Commits

• 33d05b5 4.3.0 released
• 663bfab Drop demo publish, to not override new v5 one.
• 1cb8c7b Add v4-legacy tag for publish
• 02f27af Restore umd builds back to es5
• 8be84ed Fix es5 compatibility
• 59423c6 Replace maxMergeSeqLength option with maxTotalMergeKeys (more robust). Ba...
• 6842ef6 doc polish
• 590dbab 4.2.0 released
• f944dc5 Add package.json funding field
• f692719 Changelog update
• Additional commits viewable in compare view

...

Description has been truncated

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[dependabot]

Superseded by #329.